In a 3-phase rectifier circuit, thyristor number 1, 2 and 3 are connected respectively to R, Y and B phases of the star-connected transformer secondary. When the current is being commutated from thyristor No. 1 to No. 2, the effect of the transformer leakage and the ac system inductance will be such that it will

double the voltage output through a commutation transient

prolong the conduction in No. 1 and delay the turn-on of No. 2 correspondingly

stop the conduction in No. 1 at the scheduled time, but delay the turn-on of No. 2

produce conduction in both No. 1 and No. 2 in parallel for an overlapping period through a transient

In a 3-phase rectifier circuit, thyristor number 1, 2 and 3 are connec

1.	In a 3-phase rectifier circuit, thyristor number 1, 2 and 3 are connected respectively to R, Y and B phases of the star-connected transformer secondary. When the current is being commutated from thyristor No. 1 to No. 2, the effect of the transformer leakage and the ac system inductance will be such that it will
A.	prolong the conduction in No. 1 and delay the turn-on of No. 2 correspondingly
B.	stop the conduction in No. 1 at the scheduled time, but delay the turn-on of No. 2
C.	produce conduction in both No. 1 and No. 2 in parallel for an overlapping period through a transient
D.	double the voltage output through a commutation transient
Answer» D. double the voltage output through a commutation transient

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